Full floating piston



July 29, 1947.

J. G. WANTZ FULL FLOATING PI 5 TON Filed Sept. 18, 1945 Inventor June Gordon W7l2fz Patented July 29, 1947 11:.

umrra o sureso 2 2,4243% FULL ntoA'rme-ms'ron June etraah wmrz,kndbfn ste 'mo. I Application September 18, wraps-amna-cmoiv My present invention relates to internal combustion or other compression motors and has for an object to provide a full floating piston therefor.

Another object of this invention is to provide a spring supported piston.

A primary object of this invention is to provide means for greatly or entirely eliminating detonation (carbon knock), increase power output, provide for the use of lower grade fuel for present day engines, increase super-charging possibilities, provide more even and high compression, and make for more economical and smoother running in such engines.

A further object of this invention is to provide a pair of pistons operating one within the other and a spring support interposed between the two.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure 1 is a vertical sectional elevational view of a floating piston formed in accordance with my invention,

Figure 2 is a similar view, the parts shown in a difierent position,

Figure 3 is a sectional view along the line 33 of Figure 2,

Figure 4 is a sectional view taken on line 4-4 of Figure 2, and

Figure 5 is a bottom plan view as seen from line 55 of Figure 2.

In the above drawings as well as in the specification to follow the same reference characters indicate the same parts throughout.

While one embodiment of my invention is illustrated in the above referred to drawings, it

is to be understood that they are merely for the purpose of illustration and that various changes in construction may be resorted to in the course of manufacture in order that the invention may be utilized to the best advantage according to circumstances which may arise, without in any way departing from the spirit and intention of my device, which is to be limited only in accordance with the appended claims. And while I have stated the primary field of utility of my invention it remains obvious that it may be employed in any other capacity wherein it may be found applicable.

My invention l0, consists of an outer piston H, within the lower end of which is screw-threaded a retainer ring l2, and within the chamber l3, of the piston, is another piston l4, provided with a lower annular guide flange l5, which snugly fits 2 Claims. (01. Jigsas) the surface .of the chamber l3. Seated upon said flange and'coiledaround the body N5, of piston I4, is a flat expansion spring 11, which normally completely fills the space between the flange l5, and the head ill, of piston II, and the upper convolution IQ, of the spring also encompasses a sleeve 20, held within the upper part of chamber l3, by its annular flange 2|, upon which the upper convolution 22, of the spring l'l, bears. The diameter of the body iii, of the inner piston I4, is such as to snugly fit into the bore 23, of the sleeve 20, within which sleeve the upper portion of the piston l4, operates. Apertures 24,

are provided for admission of lubricating oil into the inner piston and inclined bores 25, provide for the passage of oil from between the pistons.

The connecting rod 26, has its inner end 21, secured to the body l6, by a connecting rod pin 28. The upper end 29, of the body It, is provided with an annular channel 30, to receive the piston ring 3|, said end 2|, operating entirely within the sleeve 20. A buffer 32, is provided on the inner surface 33, of head l8, and a cooperating buffer 34, is provided upon the upper surface 35, of the piston Hi. There is also provided a buffer 36, secured under the flange I5, and lower end 31, of the piston I4, for contact with ring I2, which bufiers absorb shock and deaden noise and also limit travel between pistons to relieve undue stress.

The cycle of operation is similar to any other engine in which combustion gases are admitted to the engine cylinder above the outer piston H where they are compressed, after which the compressed charge is fired or exploded, and finally the exploded or burned gases are exhausted. It is to prevent detonation or carbon knock that the piston has been devised, and upon the firing of the charge, the shocking action on the piston is entirely absorbed by the coil spring positioned between the inner and outer pistons when relative movement is had between said pistons.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described my invention that which I claim as new and desire to procure by Letters Patent is:

and engaging the annular flanges on said inner piston and on said cylindrical guide.

2. A full floating piston including an outer pis-,-

ton, an inner piston formed with an annular flange extending outwardly from its lower end snugly received in said outer piston forreciprm cating movement therein, a connecting rod se cured to said inner piston, a cylindrical guide sleeve formed with an outwardly extending annular flange adapted to seat against the under surface of said outer piston head and to he slid- 4 ably engaged by said inner piston, a packing ring supported by said inner piston contacting the inner surface of said cylindrical guide, and a coiled cushioning spring disposed about said inner piston and engaging the annular flanges on said inner piston and on said cylindrical guide.

JUNE GORDON WANTZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,252,269 Johnson Jan. 1, 1918 1,546,243 Kimmerling July 14, 1925 1,825,163 Schweter Sept. 29, 1931 FOREIGN PATENTS Number Country Date 13,895 Austria Oct. 26, 1903 

